Bug Description

If one has a running Ubuntu 11.10 system and then boots an Ubuntu 11.04 CD and chooses to install Ubuntu you are presented with an option to "Upgrade from 11.10 to 11.04". Choosing this option results in a crash.

TEST CASE
1) Install Ubuntu 11.10
2) Try to reinstall Ubuntu 11.04 (because you are dissatisfied with the new release for some reason)
3) At the allocate drive space screen choose "Upgrade 11.10 to 11.04" (because you don't want to lose your data)
4) During the copying files phase observe a crash

After the crash ubiquity became non-responsive and I went to a tty to reboot the system. The system fails to boot after choosing either the regular or recovery boot option from 11.10.

I tested downgrading from 12.04 to 11.10 by installing 12.04 and then booting off an 11.10 CD. I was presented with the same choice to "upgrade from precise to 11.10". I choose this option and have a usable 11.10 system, however I didn't do any thorough testing of it.

In the event that you have tried downgrading from Ubuntu 11.10 to Ubuntu 11.04 using an Ubuntu 11.04 CD / DVD and now have a system failing to boot the following steps should allow you to reinstall Ubuntu 11.04 and have a working system.

1) Boot and 11.04 CD
2) Choose Try Ubuntu
3) Download "Install downgrade patch" from this bug report
4) Open a terminal
5) Execute "sudo patch /usr/share/ubiquity/install.py < ubiquity-downgrade-patch.py" in the terminal
6) Run the installer from the desktop
7) After the install completes reboot the system
8) In the grub menu from the installed system choose "Previous Linux versions"
9) Select the first 2.6.38 kernel version

Now you should be running 11.04 and have access to all your documents.

but that upgradeproblem was strange, first i tried to upgrade from 11.04 to 11.10...that crashed, after trying downgrading, it also crashes
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OK im still a little new at this but i upgraded from 11.04 to 11.10 to 12.04 now i want to go back to 11.10 clean install or at least a downgrade and that's where the problem starts. OH I'm also duel booted with win-xp. So I ran the live DVD disk of 11.10 and I tell it I want to install, then I select language, the next screen that I see is the partition window, there it says that I dont have any OS's on my HDD. OH BTW (dell Inspiron 9400)..... So now i have to back up every thing on win xp and deal with hrs of BS of updates....HELP... when I boot my pc up it loads with out problems all OS's are here .......

* Install pixmaps/windows_square.png in ubiquity-frontend-gtk.
* Make it possible to run the test suite against installed packages, and
add a DEP-8 control file for this.
* Refactor copy_all to be more robust, handle some more cases, and be
testable and tested. It can now:
- copy a directory over an existing non-directory (LP: #891711);
- copy device nodes and sockets over existing non-directories
(LP: #495217);
- handle all cases of copying a non-directory over an existing empty
directory;
- copy a symlink over a non-empty directory by attempting to move the
directory to the symlink target (LP: #188976);
- if all else fails, copy a non-directory over an existing non-empty
directory by moving the target aside to a backup location.
* Ignore all failures to set timestamps (LP: #411307, #654929).
* Update translations from Launchpad.
* Update imported translations from gtk+3.0 3.3.14-0ubuntu2 and
gnome-panel 1:3.3.5-0ubuntu2.
-- Colin Watson <email address hidden> Wed, 15 Feb 2012 17:52:19 +0000